package lab02.test20;

/**
 * Created by dell on 2017/10/26.
 */
public class Test {
    public static void main(String[] args) {
        //输入一行含有数字和字符的字符串，程序仅仅输出字符串中的全部数字字符。
        String result="echo520";
        char tmp=0;
        int i;
        for(i=0;i<result.length();i++){
            tmp=result.charAt(i);
            if (tmp>='a'&& tmp<='z'){
                System.out.print(" ");
            }
            else if(tmp>='0'&&tmp<'9') {
                System.out.print(tmp);
            }
        }
    }
}
